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Development of a portable type open-window-ionization chamberin mammography

便携式乳腺X线开窗电离室的研制

基本信息

批准号：
22591373
负责人：
SATO Hitoshi
金额：
$ 2.91万
依托单位：
Ibaraki Prefectural University of Health Science
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2010
资助国家：
日本
起止时间：
2010 至 2012
项目状态：
已结题

项目摘要

In order to perform accuracy management based on the measurement value of the correct dose in mammography, in dose measurement of the low energy X-rays from mammography equipment , the portable type open-window-ionizationchamber which the characteristic of response does not vary was developed. In order to consider it as a portable type unlike the conventional free -ionization chamber, the shape of a collector electrode and arrangement were considered. The energy dependence and the evaluation of absolutely measurement of experimental model of an ionization-chamber were performed using the dose standard place with the same energy spectrum as the equipment used in mammography screening of X-rays. The linearity of dose rate dependence was good to ～15 mGys-1. In the energy range of the X-rays from tube voltage 23 kV to 110 kV, change of the response of a detector was less than 3 %. Moreover, dark current is 10-14～-15A, and it checked that the stable measurement value was obtained for a long time. The portable type open-window-ionization-chamber developed by a new concept can implement highly accurate and stabilized measurement in case of dose evaluation required for the accuracy management in the mammography equipment currently installed in medical facilities.

为了根据乳房X线照相中正确剂量的测量值进行精确管理，在乳房X线照相设备的低能X射线的剂量测量中，开发了响应特性不变的便携式开窗电离室。为了将其视为与传统自由电离室不同的便携式类型，需要考虑收集电极的形状和布置。利用与乳腺X射线筛查设备具有相同能谱的剂量标准场，对电离室实验模型的能量依赖性和绝对测量进行评价。剂量率依赖性的线性良好～15 mGys-1。在管电压23kV至110kV的X射线能量范围内，探测器响应的变化小于3％。另外，暗电流为10-14～-15A，确认能够长时间获得稳定的测量值。采用新概念开发的便携式开窗电离室可以在医疗机构目前安装的乳腺X线摄影设备中进行精确管理所需的剂量评估时实现高精度和稳定的测量。

项目成果

期刊论文数量（0）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

薄型半導体検出器を用いたX線ビームプロファイル測定によるCTDI の評価

通过使用薄半导体探测器测量 X 射线束轮廓来评估 CTDI

DOI：
发表时间：
2011
期刊：
影响因子：
0
作者：
佐藤斉;小松崎哲也;高田麻里子;栗山和,藤田元春
通讯作者：
栗山和,藤田元春

X 線画像部門と核医学部門における品質管理(QC)の必要性

X 射线成像和核医学部门对质量控制 (QC) 的需求

DOI：
发表时间：
2013
期刊：
月刊新医療
影响因子：
0
作者：
K Nishi;M Kobayashi;R Nishii;N Shikano;N Takamura;N Kuga;K Yamasaki;S Nagamachi;S Tamura;M Otagiri;K Kawai.;佐藤斉,對間博之
通讯作者：
佐藤斉,對間博之

Investigation of absorbed radiation dose in refraction -enhanced breast tomosynthesis by a Laue case analyser

劳厄病例分析仪对屈光增强乳腺断层合成吸收辐射剂量的研究